Fireless cooker.



c. A. LAUzoN & J. AgRosB.

FIRELESS GOOKEB.

APPLIUATION FILED JAN-29, 1909.

Patented June 11,1912.

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APPLICATION I'ILBD JAN. 29, 1909.

Patented June 11,1912.

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CALVIN A. LAUZON AND JOHN A. ROSE, OF GRAND RAPIDS, MICHIGAN, ASSIGNORS,

BY MESNE ASSIGNMENTS, TO WM. EEA? t C0., OF MUSKEGON, MICHIGAN', A C0-PARTNERSHIP.

FIRELESS COOKER.

Specification of Letters Patent.

Patented J une 11, 1912.

Application led January 29, 1909. Serial No. 474,985.

To all whom it may concern.'

Be it known t-hat we, CALVIN A. LAUZoN and JOHN A. Rosie, citizens ofthe United States, residing at Grand Rapids, Michigan, have inventedcertain new and useful Im provements in Fircless Cookers, of which thefollowing is a specification.

This invention relates to improvements in tireless cookers.

ln thc manufacture of tireless cookers, it has been found that aninsulating material of woody substance or liber, such 'as cork,excelsior, bered wood, or cellular fiber of vegetable or animal originin any form, is very desirable because it is within the range of costpermitted for such material and is very effective and light, making thecookers manufactured therefrom of reasonable and convenient weight.However, when the cooker is intended to accomplish a baking, asdistinguished from a stewing or boiling action and it is consequentlynecessary to introduce heating bodies, or to raise the temperature byelectricity, these various fibers disintegrate under the action of thehigher heat and soon lose their character, and further, there is dangerof ignition as well, from the intense drying and charring action whichwould be exerted upon the same.

The objects of this invention are: First, to provide a tireless cookerin which these desirable insulating' materials can be made use ofwithout danger of their deterioration. Second, to provide an improvedand effective insulation. Third, to provide an improved construction ofparts whereby a perfect closure is insured. Fourth, to provide animproved means of retaining and supporting the heating bodies within thecooker when it is desired to subject the contents thereof to a bakingheat.

Further objects, and objects relating to details of construction, willdefinitely appear from the detailed description to follow.

Vile accomplish the objects of our invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of our invention is clearlyillustrated in the accompanying drawing, forming a part of thisinvent-ion, in which:

Figure 1 is a perspective view of our 4improved fireless cooker asadapted to and incorporated ina kitchen cabinet. Fig. 2 is a transversevertical sectional elevation through the lower portion of the cabinet,takenV on a line corresponding to line 2 2 of Fig. l. Fig. 3 is a detailinverted plan view of our improved cover, showing the means forsupporting the heater within the cooker. Fig. et is an enlarged detailtransverse sectional view taken on line 4 4- of Fig. 3. Fig. 5 shows aview of the heating clement provided with electrical heating cartridgesinserted into the same. Fig. 6 is a detail sectional view of anotherform of electrical heater for use in the fireless cooker. Fig. 7 is adetail view of a modification.

ln the drawing, the sectional views are taken looking in the directionof the little arrows at the end of the section lines, and

` similar numerals of reference refer to si1nilar )arts throughout theseveral views.

2D Considering the numbered parts of the drawing, we have shown ourfireless cooker incorporated into a kitchen cabinet, which is providedwith a base l in which the fireless cooker is situated, and asuper-structure 2 of any usual cupboard or drawer design. rlhe upperpart of the base l of the cabinet is provided with one of our tirelesscookers having doors 3, opening at the front, t-he same being especiallyintended for use as a baking cooker. The drawer l in the baseconstitutes another form of the cooker, which drawer, of course, couldbe used independent of ,any kitchen cabinet, the cabinet being merely'aconvenient place of storage for it.

An inner metallic case or receptacle 9 is provided which is suitablysupported so lthat there is a space l() between it and a second metallicshell l1, which space may be an air space, or the air may be exhaustedtherefrom so as to secure a vacuum, or partial vacuum, which greatlyincreases the eiiiciency of the cooker. Between the metallic shell lland the outer casing of the cooker, we interpose insulating material 12,which is preferably a prepared granular cork, although any insulatingfiber could be used in this position.

Within the cooker, we provide a heat containing body 5 for storing andsupplying heat which is preferably a sheet metal case filled with rocksalt or some similar material, although cast iron is an availablematerial. This is supported in the upper part of the receptacle 9 bymeans of a metallic loop 6, and cross loop 7 .which are riveted to thetop of the receptacle 9, and a swinging arm or gate 8 retains the heaterbody 5 in place. The heater body 5 may also be placed on the bottom of'the inner receptacle 9.

In the drawer cooker et we make the receptacle 9 cylindrical in form,open at the top, and secure it in place by suit-able fianging at thetop, and' connect in the same way the outer shell to the intermediateshell.

lVe provide a cover for this structure of peculiar construct-ion, havingbeveled sides with a groove 15 around the same for supporting theintermediate plate 11 to form the chamber 1() in the cover, which may beeither an air chamber or a vacuum chamber, as stated The beveled part ofthe cover is flanged at the top at 111. It is secured to the top plateby suitable means. The top plate projects and completely closes thereceptacle. A suitable depression is made in the top of this cover for ahandle, seen in Fig. 1, so that the drawer can be moved back into thecabinet and the whole be still further insulated.

In place of the heating body 5, an electrically heated body 17, likethat appearing in Fig. 5, can be made use of, which is preferably ofcast metal with electric heating cartridges inserted into suitableopenings therein. A cast metal heating body can be used in place of thecasing filled with rock salt. Another form of electric heating body 18is also illustrated, appearing detailed in Fig. 6.

Having thus described our improved fireless cooker, we desire to statethat the structure can be greatly modified in detail without departingfrom our invention. We have shown how conveniently it is adapted for usein a kitchen cabinet, but, of course, it is capable of use as anentirely independent structure.

We have found that the cooker is very eifective if We provide theinsulating chamber 10 only at top and bottom in proximityV to theheating device, as the radiation and conduction at the sides that arenon-adjacent to the heating device will not be sufhcient to unduly heatthe insulating material 12. This form We show in Fig. 7 as amodification of the structure of the drawer appearing in Fig. 2, showingthe chamber 10 in the bottom and not at the sides.

Having thus described our invention, what we claim as new and desir/e tosecure by Letters Patent is 1. In a fireless cooker, a suitableinsulated receptacle; a removable cover; a heating body; loops securedto said cover for supporting the said heating body; and a swinging armfor locking the said heating body in place, coacting for the purposespecified.

2. In a fireless cooker, a suitable insulated receptacle; a heatingbody; loops secured within said receptacle for supporting said heatingbody; and a swinging arm for locking the said heating body in place,coacting for the purpose specified.

3. A removable cover for a relesscooker consisting of a metal casinghaving a top plate and a bottom plate; a partition wall therein midwaybetween the said plates, forming a chamber toward the interior of saidcooker and a space outside of said partition; insulating materialfilling the space toward the outer side of the said partition; and aheating body detachably secured to the inner side of the said coverwithin the inner receptacle, coacting as specified.

t. In a fireless cooker, a removable cover consisting of a metal casinghaving tapered edges and having a .compartment filled with a suitableinsulating material; a heating body detachably secured to the inner sideof said cover within the said receptacle, whereby the said cover andheating body are removable together, and the said heating body isrendered accessible, coacting as speciiied.

In witness whereof, we have hereunto set our hands and seals in thepresence of two witnesses.

cALviN A. LAUZoN. [as] JOHN A. Rosa. [L A] "Witnesses GEORGE CLAPPERTON,JULIA LYNCH.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Batentsz Washington, D. C.

